初中情态动词讲解及练习题
情态动词表示语气和态度。有实际词义，但是没有单复数等词形变化。后面通常加动词原形
中考主要考查can，must，may，need四个情态动词。
除此之外，表示必要性的情态动词还有should，应该，这个语气比must弱，还有
had better（not）do ，最好（不）去做，这个语气更弱。
情态动词 | 词义 | 否定式 | 缩略否定式 |
can/could | 能够，可能 | can/could not | can’t/couldn’t |
may/might | 新航道学校可以，也许 | may/might not | mayn’t/mightn’t |
must | 必须，一定 | must not | fyp mustn’t |
should | fcuk应该 | should not | shouldn’t |
abortedought to | 应当 | ought not to | oughtn’t to |
shall | 可以，必将 | shall not | shan’t |
will/would | 愿意，决心 | will/would not | won’t/wouldn’t |
need | 需要 | need not | needn’t |
| | | |
易考点：
一．比较have to和must：
1) 两词都是'必须'的意思，have to 表示客观的需要， must 表示说话人主观上的看法，既主观上的必要。
My brother was very ill, so I had to call the doctor in the middle of the night. 我弟弟病得很厉害，我只得半夜里把医生请来。(客观上需要做这件事)
He said that they must work hard. 他说他们必须努力工作。（主观上要做这件事）
2) 在否定结构中： don't have to 表示"不必" mustn't 表示"禁止"，
You don't have to tell him about it. 你不一定要把此事告诉他。
You mustn't tell him about it. 你一定不要把这件事告诉他。
二．肯定句中，表示推测，语气最强的是must，但在否定句和疑问句中，表示怀疑，猜测，要用can高校天后电影完整版’t. （mustn’t禁止，不允许，不能用来表推测； can’t 不可能）
There is someone knocking the door. It must be Tom.
It can’t be Tom in the classroom. Becau he is ill and he doesn’t come to school today.
三．情态动词的回答
1. 以can开头的一般疑问句，其肯定和否定回答分别用：can和can’t。（Could也是）
2. 以may开头的一般疑问句，其肯定和否定回答分别用：Yes, you may. / No, you mustn’t. May/might表推测时，语气最弱。表建议请求时，语气最委婉。
May 也可以表示祝愿。
---May I go now? ----Yes. You may. / No, you mustn’t.
We may go to Shanghai, but we are not sure.
May you success!
3. --- Must I finish the project today? --- Yes, you must. / No, you needn’t.
四．其他
Shall 用于第一人称，表示征求意见，询问。 Shall we have lunch here?
Should表示义务责任。 We should obey traffic rules.
【课堂练习】
1、(2010河北省卷31. 1) —Do we have to finish our homework this afternoon? —Yes, you _____. incompleteA. must B. can C. may D. need
2、 （2010湖南省娄底市5. 1） —Must I be in hospital for a week, Doctor? —No, you .
You can go back home tomorrow. A. mustn’t B. needn’t C. must
3、 (2010江苏省盐城市3.1) The desk is not dirty. You______ clean it.
A. mustn’t B. shouldn’t C. needn’t C. can’t
4、 (2010四川省内江市23. 1) —What is your mother going to do this Saturday? —I’m not sure. She _____go to e my grandmother. A. can B. must C. may
5、 (2010山东省潍坊市23. 1) —Is Jessica giving us a speech this evening?
—No, it ________be her. She ________to Japan.
A. mustn’t ;has gone B .mustn’t ;has been C. can’t ;has gone D. can’t ;has been
6、 （2010江苏省南京市6. 1）It’s the library! So you ________know shouting is not allowed here.
A. can B. must C. need D. may
7、 (2010浙江省衢州市24. 1) Boys and girls, 国庆节英语手抄报内容don’t forget your report. It ______ today.
A. can’t finish B. can’t be finished C. should finish D. should be finished
8、 (2010江苏省无锡市8. 1)—Mr Smith must have been to your home this morning.
—No, he ______, becau he didn’t know my address.
A. couldn’t B. can’t C. mustn’t D. may not
9、 (2010湖南长沙25. 1)—Must I finish my homework at school? —_______.You can do it at home and hand it in next week. A. Yes, you must B. No, you needn’t C. Yes, I can
10、（2010四川省成都市33. 1）—The lake is said to be dry. Is that true?
—It ______. Look, sitting down heresome kids are swimming in it.
A.must be true B.can’t be true C.may not be true
11、（2010浙江省湖州市19，1）—Is the man over there Mr. Brown? —It_____be him. He’s much shorter. A.must B.can’t C.needn’t D.may
12、（2010山西省26，1）—______your American friend eat with chopsticks? —Yes, but he can’t u them well. A. Can B.Should C. Must
13、（2010湖北省十堰市29，1）—Where’s Jeff? —I’m not sure. He ______be playing football on the playground. A.need B.might C.must D.can
14、（2010山东省莱芜市30，1）—Listen! Is it Linda singing in the next room? —No, it ______be her. She is still in Shanghai. A. can't B .couldn't C. may not D. might not
15、（2010贵州省铜仁市24，1）—This pair of shoes ____ belong to Jack. He likes this kind very much. 膨胀螺栓 英文— It ____ be his. It’s too large for him.
A. can; can’t B. may; needn’t C. must; mustn’t D. must; can’t
16、（2010湖北省荆门市29，1） You _ ____ smoke. You are only 14 and it isn’t allowed.
A. mustn’t B. don’t have to C. needn’t D. won’t
17、（2010湖北省襄樊市34，1）— Can I go to the movie , Mum ?— Certainly, But you _______ be back by ten o’clock . A. can B. may C. might D. must
18、（2010广西省定西市22，1）—Who’s that man? Is he Mr. Brown?—That be Mr. Brown. He never walks this way. A. can’t B. mustn’t C. must D. can
>religion
